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Siemens S5-135U/155U User Manual

Page 389

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9-7

System Manual
C79000-G8576-C199-06

S

24 V supply for CC/EU and I/Os

F+

L+

I/O Modules

24 V DC

b)

a)

CC/EU

L+

Battery

Power Supply 24V

Supply for the enable inputs from:
a) Battery
b) Terminals for 24 V on the front plate of the power supply

Proper functioning is ensured if the 24 V load power supply has an output
capacitance of at least 4700

mF per 10 A of load current. Other units which

do not meet this condition can be adapted to this requirement by connecting a
10000

mF / 40 V capacitor in parallel.

10000

µ

F/

40V

CC/EU

F+

L+

230 V AC

I/O Modules

Load Power Supply 24V

Power Supply

Common
Shutdown of the
CC/EU and Load
Power Supply with
a 230 V AC Supply

Analog Input/Output Modules